传过来一个xml文件,需要转换成Map,能够应对不用结构的xml,而不是只针对固定格式的xml.
转换规则:
1.主要是Map与List的互相嵌套
2.同名称的节点会被装进List

如下面的xml文件:

<?xml version="1.0" encoding="UTF-8"?> <GmMail> <template_id>2</template_id> <to_address>test@corp.gm.com</to_address> <to_alias>tom</to_alias> <message>XML-未来世界 Message</message> <recipient_name>xml-tom</recipient_name> <send_address>xml-test@163.com</send_address> <sender_comp_name>xml-gm</sender_comp_name> <subject>xml-hello guys</subject> <selected_items> <item_group> <item_url>http://china.gm.com</item_url> <item_name>gm中文站</item_name> <item_desc>gm中文站desc</item_desc> <item_desc2>gm中文站desc2</item_desc2> <item_desc3>gm中文站desc3</item_desc3> <item_desc4>gm中文站desc4</item_desc4> </item_group> <items_source>products</items_source> <item_group> <item_url>http://www.gm.com</item_url> <item_name>gm</item_name> <item_desc>gmdesc</item_desc> </item_group> </selected_items> <attachments> <attachment-group> <attachment_url> http://china.gm.com/pics/com.cn.gm/story/frsc.jpg </attachment_url> <attachment_name>黄晓豫</attachment_name> <attachment_desc> <desc1>attach-desc1</desc1> <desc2>attach-desc2</desc2> <desc3>attach-desc3</desc3> <desc4>attach-desc4</desc4> </attachment_desc> </attachment-group> <attachment-group> <attachment_url> http://china.gm.com/pics/com.cn.gm/story/wr.jpg </attachment_url> <attachment_name>张中汉</attachment_name> <attachment_desc> <desc1>attach-desc1</desc1> <desc2>attach-desc2</desc2> </attachment_desc> <attachment_desc> <desc1>attach-desc1</desc1> <desc2>attach-desc2</desc2> </attachment_desc> </attachment-group> </attachments> <desc_group> <desc_item>desc_item_1</desc_item> <desc_item>desc_item_2</desc_item> <desc_item>desc_item_3</desc_item> <desc_item>desc_item_4</desc_item> <desc_item>desc_item_5</desc_item> </desc_group> </GmMail>

转换后的的Map(转换成字符串的效果):

1. {message=XML-未来世界 Message, selected_items={items_source=products, item_group= [{item_name=gm中文站, item_desc=gm中文站desc, item_desc2=gm中文站 desc2, item_desc4=gm中文站desc4, item_url=http://china.gm.com, item_desc3=gm 中文站 desc3}, {item_name=gm, item_desc=gmdesc, item_url=http://www.gm.com}]}, to_alias=tom, desc_group= {desc_item= [desc_item_1, desc_item_2, desc_item_3, desc_item_4, desc_item_5]}, sender_comp_name=xml- gm, subject=xml- hello guys, to_address=test@corp.gm.com, template_id=2, attachments= {attachment-group=[{attachment_url=http://china.gm.com/pics/com.cn.gm /story/frsc.jpg, attachment_name=黄晓豫, attachment_desc={desc3=attach- desc3, desc4=attach-desc4, desc1=attach-desc1, desc2=attach- desc2}}, {attachment_url=http://china.gm.com/pics/com.cn.gm/story /wr.jpg, attachment_name=张中汉, attachment_desc=[{desc1=attach- desc1, desc2=attach-desc2}, {desc1=attach-desc1, desc2=attach-desc2}]}]}, recipient_name=xml-tom, send_address=xml-test@163.com}

xml处理用的dom4j

package xml.dom4j; import java.util.ArrayList; import java.util.HashMap; import java.util.Iterator; import java.util.List; import java.util.Map; import org.dom4j.Document; import org.dom4j.Element; public class XmlUtils { public static Map<String, Object> Dom2Map(Document doc){ Map<String, Object> map = new HashMap<String, Object>(); if(doc == null) return map; Element root = doc.getRootElement(); for (Iterator iterator = root.elementIterator(); iterator.hasNext();) { Element e = (Element) iterator.next(); //System.out.println(e.getName()); List list = e.elements(); if(list.size() > 0){ map.put(e.getName(), Dom2Map(e)); }else map.put(e.getName(), e.getText()); } return map; } public static Map Dom2Map(Element e){ Map map = new HashMap(); List list = e.elements(); if(list.size() > 0){ for (int i = 0;i < list.size(); i++) { Element iter = (Element) list.get(i); List mapList = new ArrayList(); if(iter.elements().size() > 0){ Map m = Dom2Map(iter); if(map.get(iter.getName()) != null){ Object obj = map.get(iter.getName()); if(!obj.getClass().getName().equals("java.util.ArrayList")){ mapList = new ArrayList(); mapList.add(obj); mapList.add(m); } if(obj.getClass().getName().equals("java.util.ArrayList")){ mapList = (List) obj; mapList.add(m); } map.put(iter.getName(), mapList); }else map.put(iter.getName(), m); } else{ if(map.get(iter.getName()) != null){ Object obj = map.get(iter.getName()); if(!obj.getClass().getName().equals("java.util.ArrayList")){ mapList = new ArrayList(); mapList.add(obj); mapList.add(iter.getText()); } if(obj.getClass().getName().equals("java.util.ArrayList")){ mapList = (List) obj; mapList.add(iter.getText()); } map.put(iter.getName(), mapList); }else map.put(iter.getName(), iter.getText()); } } }else map.put(e.getName(), e.getText()); return map; } }

下面是一个创建xml的类(不重要,可以忽略,只是用来生成一个xml以便测试,可以自己写)

package xml.dom4j; import org.dom4j.Document; import org.dom4j.DocumentHelper; import org.dom4j.Element; public class CreateXml { /** * @param args */ public static void main(String[] args) { // TODO Auto-generated method stub } public Document createXml(){ Document doc = DocumentHelper.createDocument(); Element e = doc.addElement("GmMail"); e.addElement("template_id").setText("2"); e.addElement("to_address").setText("test@corp.gm.com"); e.addElement("to_alias").setText("tom"); e.addElement("message").setText("XML-未来世界 Message"); e.addElement("recipient_name").setText("xml-tom"); e.addElement("send_address").setText("xml-test@163.com"); e.addElement("sender_comp_name").setText("xml-gm"); e.addElement("subject").setText("xml-hello guys"); Element Selecteditems = e.addElement("selected_items"); Element itemsGroup = Selecteditems.addElement("item_group"); //Element item = itemsGroup.addElement("item"); itemsGroup.addElement("item_url").setText("http://china.gm.com"); itemsGroup.addElement("item_name").setText("gm中文站"); itemsGroup.addElement("item_desc").setText("gm中文站desc"); itemsGroup.addElement("item_desc2").setText("gm中文站desc2"); itemsGroup.addElement("item_desc3").setText("gm中文站desc3"); itemsGroup.addElement("item_desc4").setText("gm中文站desc4"); Selecteditems.addElement("items_source").setText("products"); itemsGroup = Selecteditems.addElement("item_group"); itemsGroup.addElement("item_url").setText("http://www.gm.com"); itemsGroup.addElement("item_name").setText("gm"); itemsGroup.addElement("item_desc").setText("gmdesc"); Element attachment = e.addElement("attachments"); Element attachmentGroup = attachment.addElement("attachment-group"); attachmentGroup.addElement("attachment_url").setText("http://china.gm.com/pics/com.cn.gm/story/frsc.jpg"); attachmentGroup.addElement("attachment_name").setText("黄晓豫"); Element attachmentDesc = attachmentGroup.addElement("attachment_desc"); attachmentDesc.addElement("desc1").setText("attach-desc1"); attachmentDesc.addElement("desc2").setText("attach-desc2"); attachmentDesc.addElement("desc3").setText("attach-desc3"); attachmentDesc.addElement("desc4").setText("attach-desc4"); attachmentGroup = attachment.addElement("attachment-group"); attachmentGroup.addElement("attachment_url").setText("http://china.gm.com/pics/com.cn.gm/story/wr.jpg"); attachmentGroup.addElement("attachment_name").setText("张中汉"); attachmentDesc = attachmentGroup.addElement("attachment_desc"); attachmentDesc.addElement("desc1").setText("attach-desc1"); attachmentDesc.addElement("desc2").setText("attach-desc2"); attachmentDesc = attachmentGroup.addElement("attachment_desc"); attachmentDesc.addElement("desc1").setText("attach-desc1"); attachmentDesc.addElement("desc2").setText("attach-desc2"); Element descGroup = e.addElement("desc_group"); descGroup.addElement("desc_item").setText("desc_item_1"); descGroup.addElement("desc_item").setText("desc_item_2"); descGroup.addElement("desc_item").setText("desc_item_3"); descGroup.addElement("desc_item").setText("desc_item_4"); descGroup.addElement("desc_item").setText("desc_item_5"); return doc; } }

下面是main调用类:

package xml.dom4j; import java.util.Map; import org.dom4j.Document; public class Demo { public static void main(String[] args){ CreateXml create = new CreateXml(); Document doc = create.createXml(); String strXml = doc.asXML(); System.out.println(strXml); Map map = XmlUtils.Dom2Map(doc); System.out.println(map.toString()); } }